Bump PORTREVISION for ports depending on the canonical version of GCC
as defined in Mk/bsd.default-versions.mk which has moved from GCC 8.3
to GCC 9.1 under most circumstances now after revision 507371.
This includes ports
- with USE_GCC=yes or USE_GCC=any,
- with USES=fortran,
- using Mk/bsd.octave.mk which in turn features USES=fortran, and
- with USES=compiler specifying openmp, nestedfct, c11, c++0x, c++11-lang,
c++11-lib, c++14-lang, c++17-lang, or gcc-c++11-lib
plus, everything INDEX-11 shows with a dependency on lang/gcc9 now.
PR: 238330

Remove BROKEN_sparc64 statement which was originally added in r277772 by
linimon@ 6.5 years ago for Snappy 1.0.2. It now builds and runs fine on
10.4-STABLE running under QEMU 2.9.0 (regression tests pass, courtesy of
TEST_TARGET). While at it, move OPTIONS_DEFINE knob where it is usually
expected to be found in the Makefile.